Apex domains cannot have CNAME records.
Question and response
Question
dig nortevision.net.gt. NS
Answer
nortevision.net.gt. 5 NS ns1.nortevision.net.gt.
Authority
The response has no authority records.
Additional
ns1.nortevision.net.gt. 5 A 179.60.225.250
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0